Forwarding packets to a directed acyclic graph destination using link selection based on received link metrics
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United States of America Patent
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Apr 12, 2011
Grant Date -
Jul 29, 2010
app pub date -
Mar 31, 2010
filing date -
Oct 24, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
Each network node having at least one destination-oriented link toward a directed acyclic graph (DAG) destination can receive a corresponding set of path performance metrics via the destination-oriented link. The set of path performance metrics, initiated by the DAG destination outputting initial link metrics on each of its source-connecting links, identifies aggregate link metrics for a corresponding path to the DAG destination via the corresponding destination-oriented link. The network node outputs a corresponding updated set of path performance metrics on each of its source-connecting links based on the received set of path performance metrics and the corresponding link metric for the corresponding source-connecting link. Hence, each network node in the DAG can assess the performance of each connected path to the DAG destination, and forward a data packet via a selected destination-oriented link based on the corresponding path performance metrics and forwarding policies for the forwarded data packet.
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